Coulomb stress analysis of West Halmahera earthquake mw=7.2 to mount Soputan and Gamalama volcanic activities

Sinaga, Goldberd Harmuda Duva; Zarlis, Muhammad; Sitepu, Maeika Putri; Prasetyo, Retno Agung; Simanullang, Ady Frenly

doi:10.1088/1755-1315/56/1/012005

Cited by 7 publications

(7 citation statements)

References 10 publications

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“…This phenomenon is appropriate and supports previous research stating that the increasing volcanic activity of Mount Sinabung is caused by the situation in the Sinabung mountain area experiencing a large press force (5). Similar cases have also been on Mount Soputan and Gamalama whose increased activity is influenced by increased coulomb stress characterized by red lobes (33). Figure 7 shows the direction of the coulomb stress change vector is still leaning more towards the southwest even though in 2015 there has been an increase in northern coulomb stress.…”

Section: Coulomb Stress Changes Of December 2004-2015 Sumatra Earthquakementioning

confidence: 63%

Analysis of Coulomb Stress of Sumatera Earthquake Against Pyroclastic Flow of Mount Sinabung as Data Prone Volcano Disaster

Sinaga¹,

Silaban²,

Simanullang³

2022

World J. Adv. Res. Rev.

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The islands of Sumatra and Sinabung are located southwest of the Sundaland Continent which is a convergence route between the Indian-Australian Plate that infiltrates to the west of the Eurasian/Sundaland Plate. The increase in activity of Mount Sinabung was preceded by large earthquakes to the west and south while the eruption of Mount Sinabung produced pyroclastics. The purpose of this study is to find out the analysis of coulomb stress from the Sumatra Island earthquake to the pyroclastic flow of Sinabung as data on volcanic disasters. This study used the coulomb stress method with coulomb 3.3. The earthquake data analyzed was Mw, depth, and focal mechanism. The results of the analysis in the form of the direction of the spread of stress and the value of increased coulomb stress in Sinabung in 2014-2016. Sinabung's positive stress coulomb value in 2014 was 0.113 bar with a positive coulomb stress spread angle of 90o against sinabung pyroclastic flow. Sinabung's positive stress coulomb value in 2015 was 0.235 bar with a positive coulomb stress spread angle of 90o against sinabung pyroclastic flow. Sinabung's positive stress coulomb value in 2016 was 0.118 bar with a positive coulomb stress spread angle of 90o against sinabung pyroclastic flow. Coulomb stress analysis affects the direction of prioclastic flow by as far as 180o although it is not the same as the results in the field. This is because the peak of Sinabung has landslides in the southeast-south, thus opening a pyroclastic flow road to the southeast-south.

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Section: Coulomb Stress Changes Of December 2004-2015 Sumatra Earthquakementioning

confidence: 63%

Analysis of Coulomb Stress of Sumatera Earthquake Against Pyroclastic Flow of Mount Sinabung as Data Prone Volcano Disaster

Sinaga¹,

Silaban²,

Simanullang³

2022

World J. Adv. Res. Rev.

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“…As explained above, the largest Sorik Marapi coulomb stress value is at a depth of 90 km, compared to volcanoes in Indonesia, such as Mount Rinjani [8], which has the highest change in coulomb stress in the range of 0-150 km at depth. It is different from Mount Soputan and Mount Gamalama, which have the largest change in coulomb stress at a depth of 10 km with an average change in coulomb stress of 0.023 bar and 0.007 bar [9]. It is possible that the change in Sorik Marapi's coulomb stress, which is at a depth exceeding the depth of the magma, does not affect the activity of Sorik Marapi.…”

Section: Changes In Coulomb Stress On Depth 0-100 Kmmentioning

confidence: 87%

“…Tectonic earthquakes preceded several cases of increased volcanic activity. Several cases of increased volcanic activity occurred in several volcanoes in parts of the world, including in Indonesia, such as Mount Sorik Marapi [7], Mount Rinjani [8], Mount Soputan and Gamalama [9], and Mount Merapi [10].…”

Section: Introductionmentioning

confidence: 99%

“…Mount Soputan, Mount Gamalama, and several volcanoes in Indonesia, whose increased activity is influenced by increased coulomb stress, were indicated by the red lobe. Earthquakes in West Halmahera affects indirectly mountain Soputan and Mount Gamalama due to long distances for the coulomb stress to be observed, causing the transfer stress and stress fracture in Soputan and Gamalama [9].…”

Section: Introductionmentioning

confidence: 99%

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Coulomb Stress Change of the 2004 Aceh Earthquake on Mount Sorik Marapi 2021

Sinaga

Tambunan

Loeqman

et al. 2021

J. Penelit. Fis. Apl.

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Sorik Marapi is an active volcanic mountain with an altitude of 2,145 meters located in Batang Gadis National Park, Sibanggor Julu Village, Mandailing Natal Regency, North Sumatra, Indonesia. Since the earthquake in Aceh on December 26, 2004, geological conditions in the western part of Sumatra Island have increased in stress. This affects the volcano in Sumatra, Mount Sorik Marapi, so it needs to be studied to find out the condition of changes in coulomb stress in Sorik Marapi. The method used in this study is a descriptive method with an analysis of the coulomb stress method. From the Aceh earthquake year of December 2004 to 2021, Mount Sorik Marapi experienced the highest average increase in coulomb stress in 2012, which was 0.171 bars. The highest average increase in shear in 2015 was 0.25 bars, and the highest average normal increase in 2018 was 0.202 bars. While at depth, Sorik Marapi mountain experienced an average change in coulomb stress highest of 0.368 bars, the average increase in the highest shear by 0.269 bars, and the average normal increase of 0.246 bars. All such increases are at a depth of 90 km below sea level. Based on the results of this study, it is stated that Mount Sorik Marapi experiences inconsistent changes in coulomb stress every year.

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“…A widely used model for explaining fault interactions is the Coulomb stress change. Fault interactions and triggering caused by earthquake rupture have been studied in Indonesia in the past few years, such as Aceh earthquake [2], tectonic earthquake around Merapi volcano [3], and tectonic earthquake around Gamalama and Soputan volcano [4]. Increasing Coulomb stress places on the region most likely to identify aftershocks in the days following a mainshock.…”

Section: Introductionmentioning

confidence: 99%

Coulomb Stress Analysis of Halmahera Earthquake on June 7th 2016, Mw=6.3 and Its Correlation with Aftershocks

Pratikno¹,

Rachman²,

Santosa³

2019

JTS

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The activity of the Pacific plate, Eurasia plate and Indo-Australia plates trigger some earthquake around Halmahera. The purpose of the current study was to determine the Coulomb stress change of the main earthquake and predict the aftershocks' location around it. For understanding an interaction of the faults, this study used Coulomb stress change model. Three component seismic waveform data recorded by TNTI station within 132 km, SANI station within 381.2 km, LUWI station within 478.3 km, and TOLI2 station within 617.6 km of the epicenter. This study used software ISOLA-GUI to obtain the parameters of the earthquake source. The parameters of the earthquake source were then used to determine fracture orientation, length, width and slip displacement. It was also used to calculate the Coulomb stress changes around the main shock, using software Coulomb 33. The result shows that the orientation of the earthquake fault has a dip angle of 48° to the horizontal plane and has a strike of 210° against the North. The fault length is 19.49 km, the fault width is 11.59 km and slip displacement is 49.43 cm. Based on plotting result, the main earthquake in Northern Molucca on June 7th, 2016 has positive Coulomb stress change that spread across the Northeast to the Southwest. This change is likely triggered three aftershocks with a range of Mw 4.7 to 6.2.

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Coulomb stress analysis of West Halmahera earthquake mw=7.2 to mount Soputan and Gamalama volcanic activities

Cited by 7 publications

References 10 publications

Analysis of Coulomb Stress of Sumatera Earthquake Against Pyroclastic Flow of Mount Sinabung as Data Prone Volcano Disaster

Analysis of Coulomb Stress of Sumatera Earthquake Against Pyroclastic Flow of Mount Sinabung as Data Prone Volcano Disaster

Coulomb Stress Change of the 2004 Aceh Earthquake on Mount Sorik Marapi 2021

Coulomb Stress Analysis of Halmahera Earthquake on June 7th 2016, Mw=6.3 and Its Correlation with Aftershocks

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